请教一则英语幽默的意思.可笑在哪里?

题目

请教一则英语幽默的意思.可笑在哪里?
There was a very self-sufficient blind man,who did a lot of traveling alone.He was making his first trip to Texas and happened to be seated next to a Texan on the flight.
The Texan spent a lot of time telling him how everything is bigger and better in Texas.By the time the blind man had reached his destination,a large resort hotel,he was very excited about being in Texas.
The long trip had worn him out a little so he decided to stop at the bar for a small soda and a light snack before going up to his room to unpack this clothes.
When the waitress set down his drink,it was in a huge mug."Wow,I had heard everything in Texas is bigger," he told her.
"That's right,"she replied.The blind man ate his snack and finished his drink.After drinking such a large amount,it was only natural his next stop was going to have to be the restroom.He asked the waitress for directions.She told him to turn left at the register and it would be the second door on the right.
He reached the first door and continued down the hall.A few steps later he stumbled slightly and missed the second door altogether and ended up going through the 3rd door instead.Not realizing he had entered the swimming area he walked forward and immediately fell into the swimming pool.
Remembering everything he had heard about things being bigger in Texas,as soon as he had his head above water he started shouting "Don't flush!Don't flush!"

答案

so the point is that he thought the swimming pool is a closestool(马桶),because he had been told that every thing in Texas is big.He fell into the closestool---in fact,the swimming pool----he afraid that other would flush and the water would take him away...Just because it..说白了,笑点就是,他以为那是一个马桶...